Letter or space indicating scale for type-writing machines.



Patented May 6, I902.

C. R. HOAG. LETTER 0R SPACE INDICATING SCALE FOR TYPE-WRITING MACHINES.

(Application filed Oct. 28, 1901.)

(No Model.)

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WITNESSES:

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Uivrrnn STATES PATENT FFIQE.

CHESTER R. HOAG, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE WHITE- HEAD dc HOAG COMPANY, OF NEl/VARK, NEW JERSEY, A CORPORATION OF NElV JERSEY.

LETTER OR SPACE INDICATING SCALE FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 699,524, dated May 6, 1902.

Application filed October 28, 1901. Serial No. 80,254. (No model.)

To all 1072,0711 it may concern.-

Be it known that I, CHESTER R. HOAG, of Newark, in the county of Essex, in the State of New Jersey, have invented new and useful Improvements in Letter or Space Indicating Scales for Type-Writing Machines, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

IO This invention relates to an improved index-plate or graduated scale, being particu larly adapted for use as a letter-space-indieating scale for type-writing machines.

The object of this invention is to produce a neat, simple, and practical scale in which the graduations are protected from obliteration and are always clear and distinct when viewed from any point of sight, being free from the usual glare or obscuring effect upon the sight due to the reflection of the light upon polished surfaces.

To this end the invention consists in the combination and arrangement of the parts of an index-plate, as hereinafter fully described,

and pointed out in the claims.

Referring to the drawings, Figure l is a perspective view of an index-plate embodying the features of myinvention. Fig. 2 isa perspective view of the parts of the device seen in Fig. 1, showing the manner of assembling the same. Figs. 3 and 4B are enlarged cross-sectional views taken, respectively, on lines 3 3, Fig. 1, and 4. 4, Fig. 2. Fig. 5 is a detail View of a portion of the coated back piece having the graduations.

Similar reference characters indicate corresponding parts in all the views.

As seen in the drawings,- this index-plate consists, essentially, of an open-sided frame 1, a pad or filling 2, a back piece 3, having a dull or opaque coating 4:, and a transparent facing 5, all of which parts are assembled and combined in a manner hereinafter described.

The frame 1 preferably consists of an elongated case of thin sheet metal, having a substantially flat back or body 6 provided with overturned flanges 7 for forming lengthwise channels 8, said channels being adapted to receive the longitudinal edges of the parts 2, 5o 3, 4, and 5, and the longitudinal edges of the frame being adapted to be crimped or impinged against the outer layer or transparent facing 5 and serve to firmly secure said parts to the frame 1. The crimping edges of the flange 7 project only a slight distance over the body 6, and thereby leaves a sight-opening throughout the length of the frame in which the parts 2, 3, 4, and 5 are mounted. The pad or filling 2, the'back piece 3, and the transparent facing 5 are all formed of substantially the same width and length as the body 6 of the frame 1 and are arranged face to face and inserted into the channels 8 from one end of the frame, it being understood that said channels are open at both ends for the purpose of receiving said parts before the edges of the flanges 7 are crimped or impinged against the outer facing.

The pad or filling 2 preferably consists of a strip of thick paper or cardboard or equivalent material and is preferably arranged adjacent to the body 6.

The back piece 3 usually consists of a strip of thin sheet metal of substantially the same length and width as'the pad 2 and is provided with an opaque coating 4; of suitable material, preferably of dull black color, having a series of graduations 10 extending transversely from each edge wholly or partially across the face of the opaque coating and preferably of a color contrasting with the color of the coating, as in this instance white. These graduations 10 may be for any desired purpose, and are here shown as representing letterspaces or the step-by-step movement of the type-writer carriage.

The outer facing 5 usually consists of a layer of celluloid or other transparent material, which is adapted to lie closely against 0 the outer face of the graduated coated surface of the part 3 in order that the graduations thereon may be readily read. This transparent facing 5 serves to protect the coated and graduated surface, and while this 5 transparent celluloid surface 5 gives the polished and trim appearance to the measuring device the dull opaque surface at the back of the celluloid prevents the usual glare or reflection of light which would tend to obscure the graduations.

In assembling the parts of my invention the frame is first formed with the crimping edges of the flanges sufficiently separated from the body to permit the free and easy insertion of the layers 2, 3, 4, and 5 into the channels 8 and against the body 6. The overturned edges of the flanges 7 are then crimped or impinged against the outer face of the celluloid facing 5 with sufficient force to secure said parts 2, 3, 4t, and 5 from endwise move ment. The pad or filling 2 being formed of yielding material permits the edges to be compressed, thereby leaving the central portion between the crimping edges between the lengthwise flanges somewhat convex transversely, which adds to the general appearance and utility of the indicating device.

In order that my improved indicating device may be properly adjusted relatiyely to the carriage, I provide each of the opposite.

ends beyond the graduations with an aperture 12 to receivef the clamping-screws which hold the index-plate in position. These grad uations are usually designated by suitable characters,as numeralsin this instance from O to 80-although it is evident that the part 4 may be otherwise graduated and other designating characters employed, if desired, and that although I have described an indexplate to be used on the carriage of a type- Writing machine it is evident that it may be employed for other purposes in which a graduated scale is used, and that the apertures in the ends of these sections serve as a k convenient means for adjusting the scale relatively to any suitable index finger or mark.

The operation of my invention will now be readily understood upon reference to the fore- I do not limit myself to the precise construction and arrangement described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. An index-plate comprising apador filling, a back piece having a coated surface provided with graduations, a transparent facing in contact with the graduated surface and separate therefrom and means for impinging the edges of said layers one against the other for holding them in fixed relation.

2. Au index-plate comprising a metallic strip, a pad or filling in contact with the metal, a back piece having a graduated surface, and a transparent facing in contact with and separate from the graduated surfaces, the longitudinal edges of the metal strip being crimped over and upon the longitudinal edges of the transparent facing for holding the parts in fixed relation.

In witness whereof I have hereunto set my hand this 25th day of October, 1901.

CHESTER R. HOAG.

Witnesses:

W. A. JONES, J. B. SHORT. 

